Abrading tool



Nov. 2l, 1944. w 1 wAcHowlTz y l 2,363,102

ABRAD I NG TOOL Original Filed Aug. 10,` 1959 INVENTOR.

@y 'UM PatentedNsv.`21,f1944 UNITED .STATES PATE ABituomoao'on e WalterJ. Waehowitz, Waukesha, wis. e f Original `applixiaton August 10, .1939,'SelriilfNo.

` 289,403, nowratent No. 2,291,666, dated August `j 4,1942. Divided `andthis application June 5, f y -1942, \ser`ia.1 No. 445;875 e e z-olaims-,-(ol. i1-481i "lhe` present "invention relates 'to -an 'abrading tooland more particularlyis directed to an abrad- "ing tool` adapted forfacing metal tubing havingI errules or other couplingmembers,securedtothe ends thereof. j u I The `present application is a division of mycopencurrg` application serialfNo. 289,403, flied Au- Cil gust 10,1939', "foran improvement in"Clampin`g I device`,now`issuedmas PatentNo. 2,291,666, dated August 4,1942. t e e I )Itis an object` of myinvention to provide an Vabrading tool comprising a body having `anexteror` `conical friction` surface `and an interior` conicalf'friotionsur-'face for facingfinternal and external conical surfaces of objects,such as metal tubing, having male and, female ferrules secured i lto,the ends` thereof. More specically, `the body of my abradin'g tool isformed of an elastic ma- The'abradin'g tool ofthepresentinvention isparti'cularly adapted `for use in 'facing the end of a tubing having a`ferru'le applied thereto and reamed as disclosedin my above referred toapplication.` i 1 'In Figure` 1 the tubing li has been providedwith a'female ferrule 5, it being understood that the end of`the tubing 4 andtheferrule 5 have pre-3 vo'usly been reamed, preferably in the mannerdescribed in my cope'nding application Serial No. 445,874, filed June'5, 1942, to forman inclined `conical surface.

havingfat one end a"frusto conical` extension "I andjprovided, iin `itsother end, with a `frustoconical recess 8"coaxial with extensionl.` Arigid pressureresistant "sleeve 9, formed of brass or lterial` ofconsir'ierable` rigidity and appreciable f "elasticity,,facilitatingfacing of `the `object`f`be`ing worked'upon. Still ,morespeciiicallmthebody of "my abrading tool .is provided with a pressure resistantsleeve' which is adapted to fit about a spindleto secure the body`thereto to be driven by Vpower applied to the spindle.

` Further objects and advantages of my invention willappearfromthe`detail description.

Figure 1 is a lengthwise sectional view through a tube and a'ferruleapplied to one end thereof showing theuse of the facing tool, the latterbej A, ing shown in elevation;

Figure 2 is a lengthwise sectional view through 9 being flushwiththeouter 'baselo'f extension l. f

other suitable materiahextends through body B, l

andv extension "ln thereof coaxially therewith, oneendfofthissleevebeingiiush with the inner base oi the conical recessBand 'the other end of sleeve Sleeve 19 is securedto body 6 andextension 1 thereof "in a suitable `known mannenbody 6 and extension `1`preferably being formed of elastic :friction material, such asasuitable rubber com` i C position, and possessing considerable rigidityas a tube and a ferrule applied thereto, of different type than theferrule oflFigure `l, showing the use of the abrading tool, the latterbeing shown `in elevation and partly broken away and in section; and

Figure 3 is a lengthwisesectional view through a tube, partly `brokenaway, ,with the ferrules of Figures l and Z'applied to the ends of thetube., and a coupling nut associated withone ofthe ferrules,` the nutbeingV shown `partly in elevation and partly broken away and in section.

In my copending application above referred to I have disclosed aclamping device for holding a `metal tube andra ferrule in position tobe secured together by expanding the end of the tube into the ferrule.Also, in the aforesaid. application a` suitable saw guide is providedfor cutting off the tubing adjacent the end of the ferrule, and in mycopending application Serial No. 445,874, filed June 5, 1942there isdisclosed a reamer suitable for rearning away the saw marks andfor pre-iparing the end of the tube preliminarily` to facwell asappreciableelasticity.` A spindle Ill` extendsthrough sleeve 9 and isprovided a short `distance `fron'rone end With a collar Il formedintegral with or otherwise `suitably secured to the spindle l0. `Theother end portion of spindle I8 is suitably threaded and receives a nutI2 which `bears upon aspring washer I3 confined" between the nut and theadjacent end of sleeve 9. By turningnut I2 tightly onto the` spindle,sleeve 9 is clamped to the `spindle for rotation therewith. Either end`of spindle I0 may be gripped `in the chuck of a brace or other suitabletool for rotating the spindle andI 6 and extension 'I thereof.

The inclination off the frusto-conical recess 8 corresponds to theinclination of the conical surface lof male ferrule` I5 shown in Figure2 of the drawing. Itfwill -be` understood that themale l, ferrule I5 isapplied tothe endof the tubing in the manner previously referred to inconnection with the female ferrule 5, all as more clearly disclosed inmy first referred copending application. This recess 8 receives an emerypaper or cloth cone I6 bearing `upon its inner surface and exposed atthe interior of recess 8, emery or other ing of the end of the tubingand the ferrule. 55'

suitable abrasive, the inclination of the cone I6 corresponding to theinclination of recess 8.

Thus, after the end of tubing 4 has been reamed` TVOFFICE The abradingtool comprises `abodyli preferably of cylindrical shape as shown,

within the body I off beyond the ferrule I5, the abrading tool .isdisposed so. that the abrasive surface of cone I6 contacts the end oftubing 4, and the tool is then rotated until the end of tube 4 has beenshaped accurately so as to provide a continuation of the conical surfaceof ferrule I5, the latter surface and the beveled surface of the end ofthe tube then together form a continuous and smooth conical surface, aswill be clear from Figures 2 and 3; `When it is desired to dress .orface the end of tube 4 in thefemale ferrule 5, a cone II'I,corresponding to extension 'I of 'body 6, is placed over this extension,the inclination of which and of the cone corresponds to the bevel of theconical inner surface at the outer end of ferrule 5,

after which the tool is rotated until the end of the tube 4 has beenreshaped or beveled to a,

proper extent to/provide a continuation of the conical surface offerrule 5, the latter surface and the beveled surface of the tube thentogether providing 'a rcontinuous and smooth conical surface, as will beclear lfrom Figures 1 and 3. `In that manner the ends of the tube andthe ferrules may nut i9 provided, at one end, with an inwardly eXtending flange 20 for engagement behind a shoulder of ferrule I5, thisnut being interiorly threaded for screwing onto a ferrule for couplingtogether two lengths of tubing 4, the coupling nut and the ferrule thusconstituting a union vbetween the lengths of tubing.

i While I have disclosed the abrading tool of my invention, by way ofexample, for use in facing the ends of straight tubing havingferrules orlike members secured to its ends, it will be understood that this is byway of example only andY that thel abrading tool of my invention may beadapted for other uses.

I claim:

1. In a tool for facing frusto-conical surfaces, a spindle having a xedstop collar, a substantially solid resilient body of considerablerigidity'and appreciable elasticity having at one end a frustoconicalextension providing an exterior continuous frusto-conical surface havinga high coefficient of friction adapted to support a correspondinglyshaped abrasive member by frictional engagement therewith and, at itsother end, a frusto-conical recess providing an interior continuousfrusto-cbnical surface having a high coefficient of friction adapted tosupport a correspondingly shaped abrasive member by frictionalengagement therewith, a substantially cylindrical recess extendingthrough said body coaxially of said i frusto-conical surfaces, a rigidpressure resistant sleeve extending through and being secured in saidrecess of'said ybody and tting about said spindle with one end in.contact with said collar, and securing means contacting the other end ofsaid sleeve comprising a nutxscrewing on said spindle effective forclamping said sleeve to said spindle under endwise pressure between saidcollar and said securing means.

2. A resilient member for use in facing frustoconical surfaces, saidmember possessing `consider-l able rigidity and appreciable elasticityand 'comprisin'g` asubstantially solid body having at one end afrusto-conical extension providing an `exterior continuousfrusto-conical surface having a high coefficient of friction adapted tosupport a correspondingly shaped abrasive member by frictionalengagement therewith and, at its other end, a frusto-conical recessproviding an interior continuous frustofconical surface having a highcoeflicient of friction adapted to support `a correspondingly shapedabrasive member by frictional

